We would use them for much more then 50 hours. But I dont think anyone really monitored the lumens.

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karmaxul Reviewed by karmaxul on . theory of magnifying light...??? One day i was sitting outside smoking a bowl with a magnifying glass and something came to me. Light is released in a concentrated, brighter beam when it is passed through the glass. I wondered if a custom made glass window with the right curvature, not as convexed as the magnifying glass, could increase the power of a light bulb. This means you can concentrate light directly on your plant. It would recieve almost all the lumens that the light emits. Basically light isnt lost; the plant Rating: 5